Warp stop mechanism for looms.



A. E. RHOADES.

WARP STOP MECHANISM FOR LOQMS.

APPLICATION FILED NOV- 6,1914. 1,214,368.

Patented J an. 30; 1917.

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Inventor. Alonzo E.Rhoades,

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STAT @FFTCEQ ALONZO E. RHOADES, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO DRAPER CORPORATION, OF HOPEDALE, MASSACHUSETTS, A CORPORA- TION 0F MAINE.

WARP STOP MECHANISM FOR LOOMS.

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Patented J an. 34] 1917.

Application filed November 6, 1914. Serial No. 870,683.

To all whom it may concern:

Be it known that I, ALoNzo E. Thomas, a citizen of the United States, and resident of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Warp Stop Mechanisms for Looms, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to improvements in warp stop mechanisms for looms of the type disclosed in United States Patent No. 885,180 granted April 21, 1908 to George B. Ambler in which the shipper-release is effected by the contact of a bunter upon the lay with a dog pivotally mounted upon a swinging carrier forming part of the shipper releasing means, this dog being moved into the path of the bunter by a governor controlled by a normally vibrating feeler which is adapted to be arrested by engagement with a detector released by the breaking warp thread and permitted to drop into the path of the feeler.

The feeler in this type of mechanism comprises a plate mounted. upon a rock shaft which cooperates with two sets of detectors guided by parallel detector bars upon either side of said feeler. In the operation of looms it is difficult, because of the large number of detectors, to determine the position of the detector which has been released by the breakage or failure of the warp thread.

One of the objects of the invention is to provide means for indicating the series of detectors containing the detector which has been released by reason of the failing of the warp thread.

Another object of the invention is to provide means by which the released detector may be agitated to enable the operator readily to find the broken warp thread and splice the same. I

The drawing illustrates my improvement as applied to the mechanisms disclosed in the patent aforesaid, it being understood that the means for actuating the feeler, the shipper mechanism, etc., are of a usual type.

As illustrated in the drawing the frame 1 supports the usual loom mechanism, the lay 2, carried upon the usual sword 3, a hunter 4: being carried upon a bracket 50 secured to the lay.

end by a rod 11 to approximately the cen-- tral portion of a carrier 12 fulcrumed at its lower end upon a stud 13 projecting laterally from a bracket 14: upon the loom side. The carrier 12 may bebifurcated at its upper end to receive a pin 15 on which is fulcrumed a forwardly extending dog 16 having a reentrant end 17 adapted to cooperate with the bunter upon the backward movement of the lay. A transverse rock shaft which in the present construction is located immediately behind the pin 15 is mounted upon a bracket in the loom frame and is provided with a rigidly attached governor 18 in the form of a pear shaped flattened plate provided with a similarly shaped longitudinal slot 20 adapted to receive a stud 21 projecting laterally from the dog, it being understood that the dog and the governor are in parallelism. The raising or lowering of the governor during the normal operation of the loom elevates or depresses the dog correspondingly above or below the path of the hunter 4: so that contact therewith is avoided. When the feeler engages a released detector the governor is arrested at an intermediate position and holds the dog in the path of the bunter so that as the lay swings back the hunter and dog will be moved rearwardly together swinging the carrier 12 on its fulcrum 13 thereby drawing the links 11-10 backwardly so as to release the shipper. When the dog is moved back .the stud 21 slides in the slot 20 of the governor as will be obvious. The rock shaft which supports the governor is provided with a depending arm 22 adjustably connected by a shackle 23 to an arm 24 depending from and secured to the feeler rock shaft 25 which extends across the loom and is mounted in bearings in the loom side.

The shaft 25 may be and is rocked in the at the end of arms 29 extending upwardly from the shaft 25 and vibrates in a path just below the lower edges of two transverse bars 30, 31, which have at their lower edges notched plates 32, 33 of the usual character.

A pair of detector bars 34:, 35 mounted above the bars 30, 31 and closer together serve to support two series of detectors a and b which may be in the form of thin fiat metal plates each having a longitudinal slot 36 adapted to receive the bar 34 or 35 and provided beneath said slot with eyes 37 through which the warp threads are carried, the detector being supported thereby upon the warp threads. The detectors which are of a usual type are provided with extensions 38 beneath the eyes 37 which are adapted to drop into the path of the feeler 28 when by failure or breakage of the warp threadsthey are no longer supported thereby.

As will be readily understood by those skilled in the art if a detector is released by its warp thread it will drop and its end 38 will be interposed between the plate 32 or 33 and the edge of the feeler 28, thereby arresting the latter and through the mechanism above described positioning the end 17 of the dog 16 in the path of the hunter 4: so that the same will be engaged by the hunter upon the backward movement of the lay and will rock the carrier 12 upon its pivot 13 releasing the shipper in the manner heretofore described.

WVhen the feeler 27 is moving in one direction it will cooperate with the released detector in one series and when moving in the opposite direction it will cooperate with the released detector of the other series in a manner common to double action feelers.

The mechanism thus far described is of the general type disclosed in the Ambler Patent No. 885,130 above referred to.

In order to indicate which of the series contains the detector which actuates the strap mechanism I have provided the governor 18 with a handle 4:0 which preferably may be made integral with said governor. The handle is located outside of the loom frame where it is readily observed by the operator attending a number of machines. As will be obvious from the description and drawing this handle will partake of the movement of the governor and will vibrate from the full line position illustrated in the drawing to the dotted line position depending upon the position of the feeler. \Vhen the feeler is arrested by a released detector the governor will be retained in an intermediate position so that'the rentrant end 17 of the dog 16 will be positioned in the path of the bunter 1. Upon the backward move- 'ment of the lay the bunter 4: will engage the end of the dog 16 and will rock the dog and its carrier about the pivot 13 thus releasing the shipper lever. This movement of the carrier will cause the pin 21 of the dog to ride back in the slot 20 and the resulting movements will shift the lever 40 to a position determined by the position in which the feeler is arrested, that is, if the feeler is arrested by a detector of the series a the lever 40 will be in a position inclined slightly backwardly from its intermediate position and if arrested by a detector of the series I) will be in a position slightly forward of its intermediate position whereby the operator may at once recognize which series of detectors contains the released detector which effected the stopping of the loom and may thereby more readily discover the failed warp thread. '3

In order that the position of the exhausted warp thread may be discovered more quickly the operator by jiggling the lever 40 may cause the released feeler to vibrate in such a manner as to instantly indicate its location. By reason of the fact that the lever 40 is located outside of the loom frame it is in a position to be readily reached by the operator.

It will be obvious that by the construction above disclosed a great saving of time will be effected since in a loom running from 3000 to 4000 warp threads it frequently takes a considerable time to locate the position of the broken warp thread, whereas by the use of the present invention the approximate position of the broken warp thread may be instantly recognized.

While this invention is described as embodied in a loom it will be understood that it is likewse adapted to the stop mechanism of any form of yarn treating or manipulating device having a series of parallel threads, the breakage of one of which is adapted to cause a detector to operate the stop mechanism or other indicating mechanism. It is also to be understood that this invention may be applied advantageously to warp stop mechanisms in which a single series of detectors is used, in which case the principal function of the invention will be to indicate the location of the particular detector which has actuated the stop mechanism. The accompanying claims therefore are intended to include broadly any indicating device which is adapted to signal the operator the series of detectors containing the member which actuates the stop mechanism and also to cover any means by which the location of the particular detector of a series may at once be discovered.

Having thus described my invention what I claim as new and desire to secure byLetters Patent is:

1. A warp stop mechanism for looms having a lay provided with a hunter, comprising two series of detectors in which each'detector is supported upon a Warp thread, a feeler and means for actuating the same to cooperate with both series of detectors whereby said feeler is adapted to be'arrested by a detector of either series when released by failure of its supporting thread, a rocking governor connected to said feeler and having an indicating handle located on the outside of the loom frame and movable into different positions when the feeler is arrested by members of different series of detectors, a movable carrier, a dog pivotally mounted thereon having means engaging said governor and adapted normally to be oscillated by said governor out of the path of the bunter on the lay but to be positioned by said governor in the path of the bunter when the feeler is arrested by a released detector and means connected to said carrier and operable by the movement of said carrier to effect the stoppage of the loom when the dog upon said carrier is engaged by said hunter.

2. In a loom comprising a shipper, a knockoff lever therefor, a swinging carrier and a link connecting said lever and said carrier, a dog pivoted upon said carrier, a lay, a hunter thereon adapted at times to co operate with the dog to move said carrier and thereby to actuate the lmockoff lever and release the shipper, a series of detectors maintained inoperative by intact warp threads, a vibrating feeler to engage and be arrested by a released detector, a rocking governor operatively connected in sliding engagement with said dog and provided with an indicating handle and connections between the said feeler and governor to rock and position the latter according to the position of the feeler, the governor normally moving the dog out of the bunter path and positioning the dog in said path when the feeler is arrested.

8. In a loom, a lay having a hunter, a shipper, releasing means for the shipper including a dog to cooperate with the bunter, a rocking governor mounted independently of the dog and having an indicating handle, a slot and pin connection between the governor and the dog, two series of detectors suspended from the Warp threads, a normally vibrating feeler adapted to be arrested by a released detector and means intermediate the feeler and governor normally to rock the latter and move the dog out of the hunter path except when the feeler is arrested by engagement with a detector, the connection between the dog and governor permitting relative movement of the dog when engaged by the bunter whereby the indicating handle is positioned differently when the feeler is arrested by a member of one series than when arrested by a member of the other series.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

ALONZO E. RHOADES.

Witnesses FRANK B. DAVIS, DANA Oscoon.

Gopiea of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G." 

